Bump puma from 4.3.9 to 4.3.11

Bumps [puma](https://github.com/puma/puma) from 4.3.9 to 4.3.11.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v4.3.9...v4.3.11)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -91,11 +91,11 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     multi_json (1.13.1)
-    nio4r (2.3.1)
+    nio4r (2.5.8)
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     public_suffix (4.0.6)
-    puma (4.3.9)
+    puma (4.3.11)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-proxy (0.6.5)